I apologize. In order to edit those settings, you have to go to:
Settings>General>Network>Cellular Data Network
then enter in these settings;
APN: wap.cingular
User:
wap@cingulargprs.com
Pw: CINGULAR1
MMSC: mmsc.cingular.com
Proxy: 66.209.11.32
Make sure to copy them, letter-for-letter, number-for-number. If it's a capital letter, type it in with a capital letter. If it's all lower case, type it in all lowercase.
Do that and get back to me.